This was a blast on our GSs. You can go either way, but allow a full day and get an early start. You will be stopping alot to take it all in - take the spur down to the CO River, good stop for a break.
Even though it was later in the morning, the road was deserted. Everybody was in church. I opened up the Sportster but all I could reach was about 92 mph. It’s not meant for speed!